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HomeMy WebLinkAbout19940929 Ver 1_Complete File_19940927State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard, Jr., P.E., Director ,I". WA A&41 [D FE F1 October 10, 1994 Swain County DEM Project # 94929 APPROVAL of 401 Water Quality Certification and ADDITIONAL CONDITIONS Mr. C.R. Styles District Engineer FILE NC DOT Bryson City, N.C. 28713 Dear Mr. Styles: You have our approval to place fill material in 0.2 acres of wetlands or waters for the purpose of road improvement at SR 1107 and SR 1109, as you described in your application dated 27 August 1994. After reviewing your application, we have decided that this fill is covered by General Water Quality Certification Number 2732. This certification allows you to use Nationwide Permit Number 14 when it is issued by the Corps of Engineers. This approval is only valid for the purpose and design that you described in your application. If you change your project, you must notify us and you may be required to send us a new application. For this approval to be valid, you must follow the conditions listed in the attached certification. An additional condition is that DOT stream relocation guidelines must be used for the necessary stream relocation. In addition, you should get any other federal, state or local permits before you go ahead with your project. If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 30 days of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative Hearings, P.O. Box 27447, Raleigh, N.C. 27611-7447. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Environmental Management under Section 401 of the Clean Water Act. If you have any questions, please telephone John Dorney at 919-733-1786. Sincerely, P.Ptop Ho ard, J . E. Attachment cc: Wilmington District Corps of Engineers Corps of Engineers Asheville Field Office Asheville DEM Regional Office Mr. John Dorney Central Files 94929.1tr P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 FAX 919-733-2496 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post-consumer paper 09-- j SM7E o 4ullbSUED STATE OF NORTH CAROLINA DEPARTMENT OF TRANSPORTATION JAMES R. HUNT, JR. DIVISION OF HIGHWAYS R. SAMUEL HUNT II I GOVERNOR SECRETARY Bryson City, NC 28713 September 27, 1994 ?.? Swain County SR 1107 and SR 1109 - - Mr. Bob Johnson 215 Army Corps of Engineer Reg. Field Office Room 75, Grove Park Ave. Asheville, NC 28801-2714 Dear Mr. Johnson, The North Carolina Department of Transportation is proposing to grade, drain, base and pave primarily along the existing roadway of SR 1109, Dills Road, in Swain County. In order to construct this project in accordance with our current secondary road standards and due to rechannelization of Totherow Branch (DEM Class C) and replacement of pipe culverts, we are requesting authorization under Section 404 of the Clean Water Act. I am sending a straight line diagram with our proposed erosion control and construction limits at various sites along this project. In addition a typical section of the road, cross sections, drawings for pipe replacements and the channel change of Totherow Branch, general notes and standards on erosion control measures and a marked county map are enclosed. We propose to install the new culverts slightly below the existing streambed elevation where bedrock is not encountered to minimize impact to wildlife habitat and allow the existing stream gradients to remain as unchanged as physically possible. The best management practices will be used to minimize and control sedimentation and erosion on this project. The construction foreman will review all erosion control measures daily to ensure sedimentation and erosion controls are being effectively controlled. If the planned devices are not functioning as intended, they will immediately be replaced with better devices. The silt fences and other erosion control devices will be in place prior to pipe construction and will remain in place until the project is stabilized. By copy of this letter I am asking Mr. David Yowe, North Carolina Resources Commission, District Fisheries Biologist to comment directly to you concerning the 404 Nationwide permit request. 0 Mr. Bob Johnson Page 2 September 27, 1994 Also by copy of this letter, I am requesting authorization to proceed under Section 401 of the Clean Water Act from Division of Environmental Management. We would like to begin construction as soon as possible. If further information is required, please advise. Your early review and consideration will be appreciated. Yours truly, C. R. Style P. District Engineer cc: Mr. Richard Phillips, P. E., Regional Engineer DEBNR Mr. F. D. Martin, P. E., Division Engineer Mr. E. L. Ingle, Area Roadside Environmental Engineer Mr. Eric Galamb, Water Quality Certification Unit, DEM Mr. David Yowe, District Fisheries Biologist, NCWRC NOTIFICATION ]FORM INFORMATION SHEET Nationwide permits that require notification to the Corps of Engineers Nationwide permits that require application for Section 401 certification A. NOTIFICATION. TO THE CORPS OF ENGINEERS DISTRICT ENGINEER. (REFER TO ITEM B. BELOW FOR DIVISION OF ENVIRONMENTAL MANAGEMENT APPLICATION RE- QUIREMENTS AND SPECIFICALLY NOTE NWP 26 DIFFERENCE.) Certain nationwide permits require notification to the Corps of Engineers before work can proceed. They are as follows: NWP 5 (only for discharges of 10 to 25 cubic yards) NWP 7 NWP 13 (only for stabilization activities in excess of 500 feet in length or greater-than an average of one cubic yard per running foot) NWP 14 (only for fills in special aquatic sites, including wetlands, and must include a delineation of affected special aquatic sites) NWP 17 NWP 18 (required when discharge exceeds 10 cubic yards or the discharge is in a special aquatic site and must include a delineation of the affected special aquatic site, including wetlands) NWP 21 (must include a delineation of affected special aquatic sites, including wetlands) NWP 26 (only for greater than 1 acre total impacts and must include a delineation of affected special aquatic sites, including wetlands) NWP 33 (must include a restoration plan of reasonable measures to avoid and minimize impacts to aquatic resources) NWP 37 NWP38 (must include a delineation of affected special aquatic sites, including wetlands) For activities that may be authorized by the above listed nationwide permits that require notification, the applicant shall not begin work a. Until notified that the work may proceed under the nationwide permit with any special conditions imposed by the District Engineer, or b. If notified that an individual permit may be required, or c. Unless 30 days (calendar) have passed from the time a complete notification is received by the District Engineer and no notice has been received from the District Engineer, and required state approvals have been obtained. Required state approvals include: 1) a Section 401 water quality certification if authorization is requested for a discharge of dredged or fill material, and 2) an approved coastal zone management consistency determination if the activity will affect the coastal area. Use of NWP 12 also requires notification to the District Engineer, but work may not begin until written concurrence is received from the District Engineer. The time periods described above do not apply. Furthermore, requirements to notify the U.S. Fish and Wildlife Service (USFWS), the National Marine Fisheries Service (NMFS), and the State Historic Preservation Office (SHPO), as indicated below and on the notification form, do not apply. B. APPLICATION TO DEM FOR NATIONWIDE PERMIT SECTION 401 CERTIFICATION. Certain nationwide permits require an application to DEM in order to obtain Section 401 water quality certification They are NWP 6, NWP 12, NWP 15, NWP 16, NWP 17, 'NWP 21, NWP 33, NWP 34, NWP 38, and NWP 40. Certain nationwide permits were issued general certifications and require no application. They are NWP 3, NWP 4, NWP 5, NWP 7, NWP 20, NWP 22, NWP 23 (requires notification to DEM), NWP 25, NWP 27, NWP 32, NWP 36, and NWP 37. The following nationwide permits were issued general certifications for only limited activities: NWP 13 (for projects less than 500 feet in length), NWP 14 (for projects that impact waters only), NWP 18 (for projects with less than 10 cubic yards of fill in waters only), and NWP 26 (for projects with less than or equal to one-third acre fill of waters or wetlands). Projects that do not meet these criteria require application for Section 401 water quality certifications. C. NOTIFICATION/APPLICATION PROCEDURES. The attached form should be used to obtain approval from the Corps of Engineers and/or the N.C. Division of Environmental Management as specified above. The permittee should make sure that all necessary information is provided in order to avoid delays. One copy of the completed form is required by the Corps of Engineers and seven copies are required by DEM. Plans and maps must be on 8 1/2 x 11 inch paper. Endangered species requirement: For Corps of Engineers notifications only, applicants must notify the U.S. Fish and Wildlife Service and/or the National Marine Fisheries Service regarding the presence of endangered species that may be affected by the proposed project. U.S. FISH AND WILDLIFE SERVICE RALEIGH FIELD OFFICE P.O. Box 33726 Raleigh, NC 27636-3726 Telephone (919) 856-4520 NATIONAL MARINE FISHERIES SERVICE HABITAT CONSERVATION DIVISION Pivers Island Beaufort, NC 28516 Telephone (919) 728-5090 Historic resources requirement: For Corps of Engineers notifications only, applicants must notify the State Historic Preservation Office regarding the presence of historic properties that may be affected by the proposed project. STATE HISTORIC PRESERVATION OFFICE N.C. DIVISION OF ARCHIVES AND HISTORY 109 East Jones Street Raleigh, NC 27601 Telephone (919) 733-4763 Information obtained from these agencies should be forwarded. to the Corps. A, DEM ID: ACTION ID: Nationwide Permit Requested (Provide Nationwide Permit ft _NWP 14 JOINT FORM FOR Nationwide permits that require notification to the Corps of Engineers Nationwide permits that require application for Section 401 certification WILMINGTON DISTRICT ENGINEER CORPS OF ENGINEERS DEPARTMENT OF THE ARMY P.O. Box 1890 Wilmington, NC 28402-1890 ATTN: CESAW-CO-E Telephone (919) 251-4511 WATER QUALITY PLANNING DIVISION OF ENVIRONMENTAL MANAGEMENT NC DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES P.O. Box 29535 Raleigh, NC 27626-0535 ATTN: MR. JOHN DORNEY Telephone (919) 733-5083 ONE (1) COPY OF THIS COMPLETED APPLICATION SHOULD BE SENT TO THE CORPS OF ENGINEERS. SEVEN (7) COPIES-SHOULD BE SENT TO THE N.C. DIVISION OF ENVIRONMENTAL MANAGEMENT. PLEASE PRINT. 1. Owners Name: North Carolina Department of Trans-Dortation 2. Owners Address: P- O. Box 250, Bryson City, NC 28713 3. Owners Phone Number (Home): (Work): (704) 488-2131 4. If Applicable: Agent's name or responsible corporate official, address, phone number. C. R. Styles, P. E. 5. Location of work (MUST ATTACH MAP). County: Swain Nearest Town or City: Bryson City Specific Location (Include road numbers, landmarks, etc.): SR 1109, Dills Road and SR 110-7, Wesser Road. 6. Name of Closest Stream/River: Wesser Creek 7. River Basin: Little Tennessee River Basin 8. Is this project located in a watershed classified as Trout, SA, HQW, ORW, WS I, or WS R? YES [) NO k] 9. Have any Section 404 permits been previously requested for use on this property? YES [ ] NO [x] If yes, explain. 10. Estimated total number of acres of waters of the U.S., including wetlands, located on project site: 11. Number of acres of waters of the U.S.. including wetlands, impacted by the proposed project: Filled: 0.2 Ac Drained: Flooded: Excavated: Total Impacted: 0.2 Ac 12. Description of proposed work (Attach PLANS-8 1/2" X 11" drawings only): To widen and pave _ SR 1109 to meet current NC DOT standards.. " 13. Purpose of proposed work: Same 14. State reasons why the applicant believes that this activity must be carried out in wetlands. Also, note measures taken to minimize wetland impacts. 15. You are required to contact the U.S. Fish and Wildlife Service (USFWS) and/or National Marine f isheries Service (NMFS) regarding the presence or any Federally listed or proposed for listing endangered or threatened species or critical habitat in the permit area that may be affected by the proposed project. Have you done so? YES [X ] NO [ ] RESPONSES FROM THE USFWS AND/OR NMFS SHOULD BE FORWARDED TO CORPS. with apphcatic 16. You are required to contact the State Historic Preservation Officer (SHPO) regarding the presence of historic properties in the permit area which may be affected by the proposed project? Have you done so? YES [ ] NO gx] RESPONSE FROM THE SHPO SHOULD BE FORWARDED TO CORPS. with application 17. Additional information required by DEM: A. Wetland delineation map showing all wetlands, streams, and lakes on the property. B. If available, representative photograph of wetlands to.be.impacted by project. C. If delineation was performed by a consultant, include all data sheets relevant to the placement of the delineation line. D. If a stormwater management plan is required for this project, attach copy. E. What is land use of surrounding property? Rural Woodland - Residential F. If applicable, what is proposed method of sewage disposal? Owner's Signature Date SWIM BALE) t, GAP HOGBACK !L41 IM T 1 12 8 .4 113. 1136 V SHOPE 20 ISO -OPE S.7 Rn 74 7 K 0 1135 CHEO.. B?v 11 .7 1113 0 R E S T - I iq 1130 6 4 1 131 AMCA Lm KNOB 1133 132 III e CWK '?o PE '.W D14 2 1-94 1105 -V-?.PINNACtE KNOB D D IN T 7 7. I 1? SRVEJILMINE GAP IF N 0 ol It. _.':;1?2. It 4 64b C SWAIN c0. ROAD NAME DILLS i S. R. 1109 FROM 5,R.110-7 4,000 TO DEAD END ADDITION IMPROVEMENT I/ TO BE PAVED ? P POLES TO BE MOVED 2 AND 2G.W-S T. POLES TO BE MOVE D 1 V-vv W I DTH 45 SCALE 1- 50 DATE 2- 25-92 LHUSDUIV LONIkU SKIVIDOL TEMP STONE DI TCH CHECK ppo '0 CK S/L T CHECK DA M LT 3,4SIIV-B -MP SLOPE DR- 411V -MP. SILT DITCH I P TH EM BANKMEIV 7- T TS D L T FEN CE WP S7-PEE4 M CPOSSIIV G >ER G LASS ROVING ?-- F G R ?uXISC1IIJ`i1Uad ......................... . ........................ . Control of Access Line.' .............. - - A Slope Stake Dine . ................ . - `" C u l v e r t=. ..... ...... --=--, + &J, 0+0 or Telephone or.'I"elegraph Pole ......... it: IS'a' -0- , 1I11tol, •-o- 1 Tower Pole and Line... ........ -? ?? 1'Potiver Pole b 1 .EasemenL Lille. - Mowing I_iniit. :." . .........'......... Guard Rail ........ ................ .. T z T S.nitary..Sewer•Line ................ .. S .5 V, per Lino, ......'. ..... • ... .......... - Gas G? S Line .'............ ............... t?tcc?t?usi:D c\ISTI.Nc ................... - --- -- -u-= -??- ChalI1 Lint.- Fence-* Woven Wire Fence ... . .............. --? -?-- Re?cnc:?I atioli .......:................ . RefoI•estaCion . ' ....... . Ter,iporarv Silt Ditch .' ............... . Temporary SUL Felice ................. Ter:porary.Slope Draill ....... ..... . Brush Barriei ................ Silt Check Dam,TA)e A..-:............. . Silt Check Dam Type B .. . ............ . 3"11L Basin Z?-pe 'A' ...:.:.. ..' ......... 7Lt Basin Type B . . RoCk Silt Check Dam .... ............. . ?-C,111 Del-III ......................... -cm n, Stone Ditch Check ....... , . I I 111 BRAD MC CALLISTER WESSEP RD. BPYSCN CITY N.C. CKEITH MAT-70X H WY 19 W. EI^'YSON CITY, N.C. '-,-GO I 01 5+00 ?-E- 4 5 ?-f tr i 4y ?i Y Yo `A 3 00 Ft A-cmp rr I? JIM DISHER 637 OLD FRIARS RD. ° COLUMBIA, S.C. 29210 O i v rin , I -?- 1-45 I I 18 ?J + 00 CMp 0t00 0 fl KEN KASTORFF 1-i {/Y. 19 'Y'V. bRYSON CITY, N.C. 50 0 Ii,)+00. , -t, 110+00 i ? ?-r 4 5=} I I 16, CMP 7*45 cr-l I Icr- 4 5 ?-? I I ` I + 5+{01 (5+00 FRANK RAGUSA W ESSER RD. BRYSON CITY N.C. 0 Ib+UU? i 15 t UU 4 5??l 0 IT fT 11E CMP i ( lcr_ I I ± 4 5 -?-I i I T i I 10 * 001 110+00 v I O w?vv I I LANCE CLANIPITT WESSER RD. BRYSON CITY, NC 8 FRED RAY C/O DAVE EVERS 24 FINALES AVE. ASHEVILLE, N.C. 28803 O 45= I e_l u T VV } I I 4- 15 -cMP ° 17 50 i I I `01 v 18 CMn I 4 S--- 15 i i 15 + 001 15 + 00 C4) 25+ 00? ? 2-5+00 48' C M P 70 I? 4 5 18' CMP 2,-? + 6 0 f STA. 22+72=22 + P3 WOODEN STORAGE SHED MBE MOVED OFF R1W cr- I 2-2-c ! I3 I I 36 CMP e ? I 4 5' i I I ! 20 + 001 120-00 BILLY DILLS HWY. 19 W. BRYSON CITY, N.C. 0 0 F 70 30+OOI I30+OU *?Q 4 5-?- "1 I i i? 0m r? rt c- i 18CMP FLOYD WALBERT WESSER RD. BRYSON CITY ?l G 3 I? cir-I I 6 + 00 a I -45 STA.24+.75=26+75 4E'X 150" C.M.P WITH JUNCTION BOX (? f '_/ I 1 I STA. 25 + 60 25 * 65 REDUCE R/W TO 20'RT. OF CL FOR WOODEN STEPS 2500 (25+00 J + 00? I35 * 00 45?-) n I i 0 STA. 334, 00 = 33+ 30 REDUCE RIW TO 16" RT. OF FOR HOUSE cr- Icr- 18 CMP , -?? 1-45 I I I 18 CMP I 30+001 I-L 130+00 E.0._F io +00 40, I 18 CMP 1 e ?-? 4 5 =?- I I 3? ; 65 1 38 + 65 1 CECIL COLLINS WESSER' RD. BRYSON CITY, I.C. 10 I U ?r iy i? 0 L' L (V ? I -E- 4 5' I 1 I 18 CMP 35+001 135+00 POLE DATA ?R0 J E C T 000NTY c11/ ?'.t? SHEET OWNER OF POLES ??? -22du/er 5?" N.O. N Q. o • rATION POLE DIST_ FROM IL .PRESENT RD, DIST. FROM CL. PROJECT, DIST Q PROD. AFTER MOVING REMARKS NO. R T. LT. R T. LT. R T. LT. ?E ?o',c ivcv S? ;w4"- 3' 1 r 5. r 1 l / ?bYNt1 ! VU, - ,' \ /' 1,%r ? '?'? ??? ?" t o f4l 352 ? '? /li/' :l ? '? ??????? ??(?-? Oil nC ilm -'A L<<? \ Il 11 q J! 9 ori? l % 6vj o Il J 1 c= • i l ? • Y ? i 1 t I, it i • I I \ ± i rlE?hl I I I o ? I I "t v I ? 0 I ? I w Coo li-P-11-1 ' STS? D-,'DO - .2-{-00 v Pack Eck ?d?( 5 NOTE: ADT TD .SCfILE le!5112146 ,/5 /0)&,00.5EL /8'614 P ??? Eck ?/P? ,Tr/LET {?ir?dPGSf? h 5k //D'/ W?SS?? Pn}lam xf'1/5TiAlG 36" C1+tP 7ZZ) 8?F/a1??f? rya? ?N?'%`,f 1 ,Sla?A?IB?D y./ pLD 4C/C PliY 1 WG P,1'0T2L7-101J TYPE-8 rO 239 Ai, Y-re7-/cfJL -,;W o?oo lv t SS f_ P F«r'? CL'o55/iJf? .1 r Pro pea/9?SFD ?W,9y I Z S t ? ?1 C v 00 ryLk OPD.SLD 117r-A /5"CAf' p 8! R15AO?&l) 7CX Cjl&k DAM I x S/L 15UIE-rd ='rv fr u"ti,? , AOT ;TO .SCE E aisTirl, D cJT.?pPE 4t,O ..5/,2480 ?Tf? 1?2 fB0 &IM4 \ PRO PO.5f25 36 L• F, -/8't Ap /0 1 7W TA._. F 1 ?;Tf?Jr P?f'CS?zj 36 "C.at P Scfi2f .M rPOPz-,,_ 7 --57W '/ t 3 3 OLD d l?W -:Z# 2/t 33 ;100P-MV S/LT dcE IREAM 64.41419L Be A/[L,- A V L.,r- 36''c'-AP y" legi+1oVED /"_/?' Y??77«IL peoPo5E-D A&Z L?W2 1--1146 5' --smirA ffAnlnlEL 7d ? f/11..?.A ,IICx/ ,57p,24+56 - STX 21D 4 50 Tf?(POe,4e- ' S/LT A5,46,?5 Rock ?/?c,e s - Po'o)oo3z.2? \I P2DPO,:SeD 'agol-F - 241'CMP P90,0os-6-2) JUiJc_77oW SC?E?'nl 1 EROSION CONTROL DETAILS AND SPECIFICATIONS 245.03 Temporary Silt Ditch ............... 245.05 Temporary Diversion 893.01 Temporary Silt Fence !H- 890.05 Temporary Slope Drain-with . Earth Berm .......... <-- •- 245.01 Silt Basin Type A 1 ................................. -0 245.02 Silt Basin Type B T 892.04 Temporary Rock Silt Check Type-A .......... 895.10 Temporary Rock Silt Check Type-B 892.01 Temporary Rock Sediment Dam Type-A ............ 892.02. Temporary Rock Sediment Dam Type-B -_- 897.01 Rock Pipe Inlet Protection Type-A s 897.02 Rock Pipe Inlet Protection Type-B ............ 894.01 Rock Silt Screen 245.04 Stilling Basin .......................................... ........ Rock Inlet Protection: 896.01 Type A ------------------------------- A OR ..A 896.02 Type B •-----------------------•-••--• B E3--OR -- B ? 896.03 Type C ............................... C OR -- C) 12 March, 1992 TEMPORARY SILT FENCE: A temporary silt fence is commonly used at the toe of a fill section to prevent off- site sedimentation. It is made of permeable filter fabric buried at the bottom, stretched and supported by steel posts. The silt fence reduces the water flow while retaining the sediment. They may also be used to divert water flow to protected outlets. Silt fences need to be checked after each significant rainfall to ensure there effectiveness. They must be maintained on a regular basis. Silt fences shall not be installed across streams, ditches, or waterways. AREAS OF USE: • At toe of fill sections where sediment runoff can be stored and contained inside the project limits. DESIGN CRITERIA: Material With Wire Without Wire Fabric Type 3 Class A Type 3 Class B Steel posts length 5 ft 5 ft. Post spacing 10 ft. 6 ft. maximum 17 March, 1992 z ¢ i ?- °: m z, I -I I fi I?I ax I' I I i! Uz r4 LJ U III--------- ww z m O Ex., w zo "'o ------ -- OE_ W M z 94 r.3 w? ¢w a I w3 Cf) w o _ z w In ' N ¢ Er I I I- ? ~ HP mg mn #1# x3 ¢m ?, ? ? CL "?z III- ?'?J as a ?- L) III O =xz? o? c a ? ? o¢ .. ? ?Qu ZD u w ? p . i M T r c? d W C O•? H A w z Q., ''?'--- w z z 3 ? F^r. w w ¢ 0?- -- °da ?aaw zrT. ?r m -3 E- ?w wa w I to En E Q? M=C..C4 0 zx avn zww z V x max aAac?xx Q z da- xzwwaE"' I- ¢z ¢ M 4E- -'?.w wx awaOa iI) Ea. `$ AMW Ux?xx >, 3i tqw aq? ?E-?OFtnwES A m z M--A E- o zlo Hu x¢w G.,?1: d°aa0 °_!wI E-o ?Hzcixzwwadcni°I 0-? wAazE-- zE-wE O!?¢ In ?a coQ?MtFWE 0 .r1QO 0 z oz Nl ¢. Z -Ow Ofs.A xd ?I .. ?. a ¢ w; N O cr; lo'm? oi¢ .z I 18 March,1992 TEMPORARY ROCK SILT CHECK TYPE-B: A temporary rock silt check type-B (also called check dam) is a small dam with a weir used to reduce gullying in drainage ditches that are to be filled or permanently stabilized at a later date. These type-B rock silt checks help reduce the flow velocity and are generally made of class-B stone. They are used in ditches during construction where the grade meets and/or exceeds 3%. AREAS OF USE: • In channels, roadside ditch outlets, temporary silt ditches, and temporary diversions. • In conjunction with type-B silt basins. DESIGN CRITERIA: • Center of rock silt check shall be at least 1 (top of channel sides) • The spacing (ft.) = (3 / % of ditch grade) X foot lower than the outer edges 100 ft. 27 March, 1992 'r a U O 0 mu O i-:a, w a J 00 Z JS a O J F- 0 3 F-JaZ (DOSOZZ O 'ji ill- (nUOO nl W d > mzow (n a_ Z co I O = O UaF-Wc-. J ; W J _ dW O O Q n = • aWm• > ?- 0-M UOm Cn• S?+IL W W ?- WO Om Z(rWLLCLWO N p¢p J __- w OWU) Z(n 6N V WF- COO--C< !- I • 1 LU S U F- o S J •-+ - F- J = w O OUaZ(nU Z LL .- O- ? . .- U o CL 0 ' ---I a (n J s 0 ~ S S ° to .? ?- ?---+ Q? O U C+y N a 0 0 7 I g - Q ?zv ? w LL ¢ u LLJ ?- m U zz? C) m CD LL Lt d Z w 0 Lu o O F- Q cn Z.,-r N ? O 0O u m m ; Q F- O = ? O o / Y U Z F- t l- • a.,, z p o ? 0o . w = y . w F- U F- ?-' - - e > Z - ?-- ° Z -•1 a WH (n O - Z -N = W Q N O ---- o p L a o a LOW (Ow Ln w Q o0 p> 0 ? O U z 0 <I -- ° f- W. 01 Cl7 1 II Qiz¢; rl °I N i> ill, D E , o' m' 1 f o. r a; 28 March,1992 ROCK PIPE INLET PROTECTION TYPE-B: t.? A rock pipe inlet protection type-B is a small horseshoe shaped structure. The type-B rock pipe inlet protection shall be used at pipe inlets which are 24 inches and less in diameter where there is insufficient space for a type-A rock pipe inlet protection with storage area. The type-B rock pipe inlet protection utilizes class A stone lined with #5 or #57 stone to protect drainage pipe structures by impounding the sediment laden water before it enters the pipe to trap sediment. This device can also be used around the inlet of temporary slope drains where space is limited at the outlet end of slope drain such that a basin or other device can not be used. AREAS OF USE: • At inlets to pipes no larger than 24 inches in diameter where it receives flow from several directions. • In low flow areas where right of way is limited. DESIGN CRITERIA: • Structural stone - class A • Erosion control stone - # 5 or # 57 stone. • Dam height - 1.5 ft. minimum. 35 March, 1992 G CJ J C4 W q E ? %CD ¢ Haz C, r-- o c ,-, w a?n l AE, W O E-`n a ::) c S Crj Z< a V1; o F-? z W ¢ w0 •aZ? QgV1W z C4 C, !x , o w OWO~W1. E- 0 E- WC X04 atz z.az' C?-4 m .AE-m O W OO eozw.<Zw Co E-C =U ¢ Q. zU6Cn EO»0V) Cl) LlJ f?¢f1 zW 7E z W E..Z W W azU.'z q=ww0.4wz MV)- E- U) UCGE-O , M -C4 ?a .I Z Do E .<-0 f- ?.L "--- ¢`:"Or?Aawaw°c?WOF..xw 3 wE,U.ax E-waz UE»WW Q? Z E-Cn 6zzZV ':Cow. .,ZEUxw J C) O W=000 =E-00:0 L)F- z MMUE--U WMEs..a.U ¢OE-? LL f'-- w V a- -? 1 W a ¢ ?- LLJ x v a F- .r 0 CD > LL 3 Cr ?'. I ? 1 U LLJ a- a. Z D Z C:: O _ 1 F- 1 r Cn C uj - 1 Lli \\\yl 1 N ? 1 1 V. 1 1 f--? I ff ' ?~ QY? Z u Z pp IOL 7? . Q O O r-. Cl- CD 7.. J v. Q to O D ?- r O Q Z J 1 i _ p Z z lzi I Q 0 W `?? O I I Cr) 0 ZI -iii 7 Q' v Q V) 7 Lli J I A lf). ' p? ?I w? a w IZ; E P T h 1 -gym; -?.- i Z- 36 6 March, 1992 ROCK SILT SCREEN: A rock silt screen is a low-level dam structure to be used in streams below culvert sites. Rock silt screens shall be used to trap sediment transported by running water and shall be placed in the stream below the construction site within the right-of- way or easement boundary. The rock silt screen utilizes class B stone lined with #5 or #57 stone to produce a ripple-effect in the stream to settle the larger sediment particles transported in the stream from the construction site. The trapped sediment shall be cleaned out before the device is removed from the stream. AREAS OF USE: • In live streams below construction sites where construction occurs in or adjacent to the stream. • In live streams below a culvert construction site. • Where it can be cleaned before it is removed from stream. DESIGN CRITERIA: • Structural stone - class B stone • Sediment control stone - # 5 or # 57 stone • Dam height - 1.5 ft. minimum and 3 ft. maximum ( shall not be higher than 1 ft. above normal flow of stream) 37 March, 1992 vo G, "_' ?? Gv _ u0 m '1?'tJ A-6 L-Li t I 1 LL CL 5 LL LJ ?8 8 Vi mac •_ v) L V . e_ L J w AO m v-_Z _ i ¢ u (n O Q?L« a 0^ O w? a W xLC Z QZE- Q E Z 0 x 0 r W Z D O?j¢OZ a V) Z E- 0.0 p- W E- ° Z z wp¢dwo zwu oWw ih o Q zv?_ aV6: o m¢W wa m a .tn xwd op0' ?+ o rr p.ij. F- C, - v?w x Z = F' w? Cr ? U ? Q n , Z * V (W ¢ dz L) ozo0Z z W.-P z fi z GaxwC W Fw`WE-0m WZE- OW> =» l? O zj W w L)Z OOOMdU1 -,M¢E-a'pm? NL ? U O? - O ?E-xax= gaw¢wxxa¢x E.. E-- V) ¢Waz E+¢a E- ZdZZ E < w2 E ? F cr.c? -ID o am V? z=¢ LL O C40=00 xE-O= O xG- W ? O v lZ N AEI ? i r Ill.li Z I IRM%l I ?`•._._ o`- E t n m w 0, N 38 March, 1992